Restricting Access to Specific Ports and Domains Using Source IPs in Firewall Rules

Step 1: Navigate to the VPC Dashboard

Go to your VPC dashboard or firewall management section where your port forwarding and routing rules are configured.

Step 2: Edit or Open the Port Forwarding Rule

Locate and open the specific port forwarding rule you want to modify (where the target instance, port, and source are configured).

Step 3: Modify the Source Field

Locate the Source field, which is set to any by default, and replace it with your specific allowed IP address or network CIDR block (e.g., 192.168.1.50 or 203.0.113.10).